【摘要】 采用有限体积法开发了在任意欧拉 拉格朗日(ALE)框架下三维非定常流体流动的数值模拟程序。利用该程序对二冲程发动机换气过程中的气体流动情况进行了数值模拟,并给出了二冲程发动机工作过程中不同曲柄角度时的气流速度分布,结果显示该程序对于定量研究工程技术问题中复杂几何体内的流体流动,有着良好的普适性与实用性。更多还原

【Abstract】 A general numerical computing program for threedimensional and timedependent fluid flow has been developed based upon an arbitrary LagrangianEulerian scheme with the finite volime method.The air flow in a loopscavenged twostroke engine is calculated,and the air flow distribution with various crank is given out.The result shows that this program adapts to study the air flow with arbitrary complex shape quantificationally in engineering problem.更多还原